SIG SG 551-1 SB SWAT PE (Privat Einzelschuss), (.223 Remington/M193 Ball)

Описание: Type: Semiautomatic carbine
Produced: 1982-Present
Caliber: .223 Remington/M193 Ball
Action: Blowback, rotating bolt
Safety: Fire selector
Magazine: 5, 10, 20/30 rounds, box curve single
Sights: Rear, open sight adjustable with tritium night inserts (elevation/windage, rotating diopter drum 100-400m); Front, hooded folding night post
Cyclic rate: 650 rpm
Grooves: 6 grooves, right-hand twist, one turn in 7" (178 mm)
Barrel length: 10" (254 mm)
Length: Folded stock, 21.6" (607 mm); Extended stock, 31.4" (833 mm)
Muzzle energy: 1,133 ft-lb (1.536 J)
Muzzle velocity: 2,893 ft/s (882 m/s)

The SIG SG 551 is a variant of the swiss assault rifle SIG SG 550. In 1978, the Swiss Army formulated requirements for a successor to the StG 57 battle rifle (known commercially as the SG 510) using the 7,5×55 mm Schmidt Rubin cartridge. Emphasis was placed on modularity. The weapon family included several variants of the base design, including a compact carbine that would be issued to rear-echelon and support troops, commanding staff, vehicle crews, special operations personnel, and paratroopers.
Another aim was to reduce the rifle’s overall weight while retaining comparable or improved accuracy out to 300 m. The solicitation was narrowed down to two designs: the W+F C42 (developed by the state-ownedWaffenfabrik Bern, using both 6,45×48 mm and 5,6×45 mm cartridges) and the SG 541 (developed by SIG). In 1981, the experimental 6.45mm GP 80 cartridge was rejected in favor of the more conventional 5,56×45 mm GP 90 round (with a 4,1 g, tombac-jacketed, lead core projectile) that is the Swiss equivalent to NATO’s standard 5,56×45 mm cartridge.
The SG 551 carbine has a short pattern 363 mm (14.3 in) barrel, gas tube, and piston compared to the SG 550. The SG 551 series rifles have a long sight radius of 466 mm (18.3 in). The handguards were also changed and the bipod removed. The SG 551 cannot be used with bayonets or fire rifle grenades. The SG 551 comes in several specialized variants designed for use with security and special forces.
Among those variants are the SG 551-1P police carbine (designed to engage point targets out to 300 m; equipped with a Hensoldt 6×42 BL telescopic sight and detachable cheek riser), the SG 551 SWAT carbine (coated with a corrosion-resistant finish and fitted with an optical sight mount used with a wide array of sights, and can also accept mission-critical accessories such as a bipod, laser pointer or tactical light) and the SG 551 LB carbine with an extended 454 mm (17.9 in) barrel that enables the use of rifle grenades and a bayonet.
Usually it's equipped with a highly tested and accurate sighting system. A universal scope mount is available and accepts a wide range of sighting aids such as night-vision equipment, Trijicon ACOGs and other STANAG-based optics without the need for special tools or adapters.

Credits:
Author's knowledge;
DOCKERY, Kevin - Compendium of Modern Firearms: Edge of the sword. Vol. I. Berkley: R. Talsorian Games, 1990. ISBN 978-0937279236;
https://www.remtek.com/arms/sig/551sw...
https://en.wikipedia.org/wiki/SIG_SG_...
https://special-ops.org/sig-sg-551-a-...

Manual:
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